Carbureter



MARR.

VV. L.

CARBURETEH.

APPLICATION man MAH. l?, w15A W. L. MARR.

CARBURETEH.

APPLICATION man MAR. 17, 1915.

Patfem-e Aug. i5, mi@

nam

2 SHEETS-SHEET 2.

Cri

. threadeffl imi iii lili., liti@ Verrier i kCAELEURE'Elli.

Application filed March 17, 193.5. Serial Ill'o. 5,101

lle :it known that l, Muizen L. lilAniz, a citi :n oi. the United States of Aiiierioa, residing at Flinn in the oounty of lgenesee and tritate of lliliehigiin, have invented certain new and useful Improvements in *Carburotore. oi which the following is epee-ineai tion.Ik reference being had therein. to the ae coiiiimiiyiiig drawings.A

This invention. relates to earburetei's and to :in arrangement thereof whereby the siiceee's'tul operation thereof is not dependent upon the piston speed of the inotoiwto whi'eh the carburetor may be attached, the parte being o dielioeed that the motor is supililied with a -`iiiliieieiitly rieh mixture, even under slow speed7 to insure regular firing and eonsequent proper running of the engine.

'l'he invention consists of the matters here liiral'lei: eet forth, and more particularly pointed out in the appended Claims.

ln the clrawinos, Figure l is a View in veru tie-.zal longitudinal section taken through a em'biireter that embodies features; vont the inition7 showing the .main valve in open poeition j; lig. is e. View in transverse section taken on oi.' about line lfb-#ll of Fi. l; F Si a `View in vertical longitudinal Section taken al; substantially.right angles to the piane of View of Fig. l showing the main talvecloseda and an auxiliar f fuel 4iteed valve.

Referring to the drawings, a earbineter body which may be oi any preferred appropriate design and which is herein shown as Consisting et a base Seetlon l, intermediate Seetion 2 and head section 3, is provided at the lower oi base section with a fuel Chanic2 '1o which the Supply of tue] may be regniated, it desired or preferred, by any Well known ineens :le for example a float l- 0011-' trolling; :i suitable feed -valve (not shown). .el diaphragm 5 iornis' va dividing Wall betiiieeii the lower base section and the interiiiedi'ate section 2, such diaphragm as herein shown being :formed integrally Witha de- `ieiiding stein 6 that or purposeerof simple mechanical construction may forni means for attaching the base thereto by serewengagement. A, valve Seat indicated at is formed in a diaphragm f?, intermediate a lateral air inlet in the middle section aiifl an air outlet in the upper section 3, the outlet being; eon- A trolled by a throttle valve 9 of appropriate type.

Specification of .Letters Patent.

inain annular' latenited Ang. ili, MM.

A lift closure dish .l0 seals the opening* f icireled by the valve seni". 2T, a depen,A i'ali'e stein ll being reciprocal in a guide opening olf the stein (l. A bushing)r ,lil with slightly. ilowiiii'arilly tapered bore is nioiinted in ai. l iilinfiiieut. preferably, with the valve seat 25 in a bridge 13 :ierose the in., rior 4oi' the mirbiiretei" herein illustrated :is formed in the upper sect1' on, 3. :i inain pige li' extends :from Athe fuel elianiber of the baste l into a duet l5 that is regulotably Controlled by a suitable valve, for example the need le eioeui'e lil so that the outlet there of may discharge to :i greater or less extent into a peripheral ,Qjiooi'e iorined in the :f A outer fsiirlzuie ol the bushing l2, apertures 17 forming; eon'nniiiiieating openings be- .tween the groiive and the bore oi' the bueliing. plug; closure 19 adapted to Seal the bushing lil is :id justably .mounted on the elosure l() melbi.' nieane of' depending stein rod '1Z0 longitinlinally adjustable iii a enit able opening of the elioeure l() and its depending; stenti ll.

The .adjustment between the closure l0 and the plug is siieh that when the niotor to which; the `eabureter is attached 'is running at or betijveeii predeteimiiied- Speeds. the elogi e l0 iineeats the plug '19 and thereM by perinii ne aspirator effect of the imesh ing Column oi air diie to the suction oithe motor to .volatilize the injected or indraiin fuel and project it through the outlet oil the carbu-rester.

An aiitiliarjlf Speed tube 2l leads from the fiiel'ehainber in the base l of the carburetor to an auxiliary inlet duet 2:2 having an np- Wardly extending; jet pipe forming its outlet, that'diechargee into a vaporizin'g tube 23 entendingthrough the diaphragm 'l'. 'liie flow through the passage is controlled bj; regiihtting;1 valve wliieh :nay/take the forni of a needle closure El.

llllheii set' for action the auxiliary feed pipe or tube is eijiened eiii'iieientluif' so 'that when at low speed and before the suction is eiiilieieiit to litt the closure dish l0, the inriishing: air through the comparatively enla/ll aspiratii'ig"tube into which the aiigiiliary tiibe discharges, the fue] ie '\f'apoiized and cari" d along by tl'ieeurrent et air, iiliieli nieves' rapidly throiigh *he Coniparatively en iall oie/ning, to fully supply the motor evenv at low speed so th t there is no c oit .iniseing or. or" failing; to op eratfe. lll/*hen thefniotor attains liili or any speed Within the limit for which the 'll iile thedetails of construction may be varied tome-et tliedill'erent requirements of main valve service, the gel'xerall design of the carbureter hereiiislioivn isprefei 'e as it simplilies the machining and assembling of the parts, while' at the same time fle air passages are so proportione l li ided that the requisite velocity maintained even at slow' speed of the engine, to obtain the desired aspirating ell'ect' atthe auxiliary valve nozzle so that the resultant mixture is tired regularly in all of thev motor cylinders. AtV high speed the disk closure lifts and so increases the area of the 'air passage through the carbureter that the "velocity of the air past the auxiliary valve' nozzle' fallsso that the auxiliary val-ve is not` effective to Lcause an i'nl Ijector efl'ect'at `this point, While/the valve is. drawn on for the supply; rlhus,

since the main valve is raise-d to a greater or less extent in accordance with thev force of the motor air intake, the sup-ply from the automatically :adjusts itself to the motor' speed within' the range for which the carbureter is designed to operate after the low speed auxiliary air valve becomes idle.v

(jbviously, changesv in the details of construction may be made without departing from thesp'irit of my invention and I do not care to limit myself to any or arrangement of parts.

What l claim iS:- 1. In a carbureter, a casing having an air inlet and outlet, a. diaphragm acros'sthe carbureter between `the inlet and outlet provided VWith .a restricted auxiliary air openparticular form ing that is constantly openand a main air ing through 50 opening, a closure for sealing the main openthe diaphragm when the air velocity through the carbureter falls below a predetermined point, fuel supply means dis!4 charging into the' casing between the aphragm andthe outlet, operated by the main opening closure, and means for delivering fuel into the lconstantly open auxiliary air passage.

f2, 'In

restricted auxiliary air .passage and a comparatively large main air opening, a closure lfor the main opening normally seated by gravity, fuel vaporizing means controlled by the closure to open when the `latter uncovers the m valve, the air passing through' the `always open and a .connected by' a main air passage,`

main

. ment a carbureter, a casing havmg an an' inlet and an'air outlet, a diaphragm between f opening and adaptedito discharge into the casing between lthe diaphragm and the outlet thereof,`and means for delivering fuel into the auxiliary airpassagc.

In acarbureter, a fuel chamber, a diaphr gm between an air inlet in the earb'urete'r and an air outlet therefrom, provided with a* restricted air passage that is main air passage, a closure foi" the main passage, a fuel supply valve opened by tie movements of the closure"for delivering fuel from the fuel compartment between the diaphragm and air outlet, and an auxiliary fuel valve adapted to deliver fuel from the fuel compartment into the auxiliary air passage.

l. In a carbureter, a casing having a fuel compartment, and an air inlet and outlet a diaphragm across the passage between the inlet and outlet having a restricted auxiliary air opening and a main air opening, a closure sealing the main air opening and lifting therefrom under influence of air passing from the inlet-to -the outlet, a fuel regulating valve controlling a main duct from the fuel compartment that opens into the main air passage between" the diaphragm and air outlet, an auxiliary fuel valve controlling a duct leading fromv the fuel coiupartment and discharging into the c0nstantly open auxiliary air opening, and a closure for the main duct outlet that is operated by and in unison with the main air opening closure.

5. A carburetor comprising a base having a fuel supply compartment, an intermediate section vmounted or the base and provided with an air inlet and a diaphragm having a in ain airopening and a restricted auxiliary air opening, a fuel compartment and discharging into the restricted auxiliary opening, a valve regulating the flow through the duct, a cap mounted on the intermediate section having an air outlet, a main fuel supply duct leading from the fuel compartment and discharging into the cap above the main diaphragm opening of the; intermediate section, a closure restricting and sealing the discharge f of the main fuel duct, and a closure for the main diaphragm opening adapted to be lifted therefrom by air' passing fromthe -inlet to the-main outlet and arranged lto operate the main fuel duet closure' in response to the closure 1nove 6. In a carbureter a casing having an air inlet and an air outlet, a diaphragm in the casing across the passagebetween the air inlet and outlet having 'a restricted constantly open auxiliary air passage and a main air opening, ,a fuel duct discharging into `the auxiliary air passage, a regulating valve for the fuel duct, a closure for the main opening adapted to be moved therefuel duct leading from the from by air passing from the inlet to the outlet, a main fuel duct discharging into the casing between the diaphragm and the main air outlet, a closure regulating the discharge from said main duct, and moving in unison with the diaphragm opening closure to which it is connected, and a throttle valve controlling .the main air outlet of the earbureter.

7.4 In a carbureter, an intermediate section having a stem depending from the base thereof, a base section including a fuel compartment secured to the intermediate section by the stem, a diaphragm across the intermediate section having a restricted air passage and a main air opening, a closure for the main opening havinga'stem in lsliding engagement With a guide opening in the Tr" depending stein, a fuel supply duct leading i 'i 20 from the fuel compartment of the base and discharging into the restricted air passage, a regulating valve for the duct,l a cap on the intermediate section having an airoutlet in communication through the restricted air passage and the main air opening, with an air inlet in the intermediate section, a main Ifuel duct leading from the fuel com partinent and discharging through diffusing openings into the interior of the cap, and a closure for the diffusing openings connected to the main air opening closure and operated thereby.

8. In a carbureter, a base having a fuel compartment; an intermediate section on the base having a central depending stem by which the loase is secured, a diaphragm closing the upper end of the intermediate section and havinga restricted always open auxiliary air passage, and a main opening both in communication with an air inlet to the intermediate section, an auxiliary fuel duet from the fuel compartment having a jet nozzle discharging into the restricted air passage, means for regulating the flow through the duct, a closure adapted to seal the main opening and provided with a guide stem longitudinally reciprocable in the depending section stem, a cap mounted on the intermediate section, a taper bored bushing in the cap in the air passage thereof Connecting an outlet from the cap with the openingsof the diaphragm, a main fuel duct leading from the fuel compartment and passing through lateral openings in the inner periphery of the bushing, and a closure adapted to seal the bushing and connected to the main opening closure to move in unison therewith.

In testimony whereof I aflix my signature in presence of. two Witnesses.

WALTER L.V MARR. Witnesses v ANNA M. Donn, CHAs. W. STAUFFIGER. 

